Caution. Those peat pots DO NOT rot away in my experience. Keep the peat moist. You'll want to pot in bigger pots or outside within a couple weeks. Tomatoes grow fast. Even cherry tomatoes often grow big big plants.
Again my advice is remove the peat pot.
I used peat one year, planted out in garden, plants were stunted and roots could not grow through the peat. Even though peat was buried.
